Which solution is most acidic?
10^-3 M H+ or 0.001 M H+
010^-5 M H+ or 0.00001 M H+
O 10^-7 M H+ or 0.0000001 M H+
O 10^-11 MH+ or 0.00000000001 M H+

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3